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3 years ago

Pierre has more money than alex.

Mathematics

1 answer:

Lelechka [254]3 years ago

7 0

Answer:

p = 2a-22

a= p-20

these will help you find the actual value

Step-by-step explanation:

this is not for the actual value

pierre = p

alex = a

p = a+20

p-20 = a

p+22 = 2a

p = 2a-22

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isaac has a piece of rope that is 5 yards long. into how many 1/2 yard pieces of rope can isaac cut the rope

marusya05 [52]

What you have to do is figure out how many half inches you need to have to figure out how many half inches equal 5 yards. Therefore if there are 12 inches in a foot, then that would be 24 half inches. So..... three feet equal 1 yards. So multiply 3 by 24. 3x24=72 so you would need 72 half inches

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4 years ago

Explain how you find the median of a set of date that has an even number of data points.

wel

Answer:

If there isn't an exact number in the middle you take the two numbers that are in the "middle" add them together and divide by 2

Step-by-step explanation:

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3 years ago

class size m average 0.82 n class n average 0.78. if the average for combined classes is 80%, what is relationship between m and

katen-ka-za [31]

Answer:

The relation between m and n is , m = n

Step-by-step explanation:

Given as :

The average for n class = 0.82 = 82%

The average for m class = 0.78 = 78%

The average for ( m + n ) class = 80%

So , $\frac{x_1 +x_2+x_3+x_4+ ....... + x_n}{n}$ = 82%

And $\frac{x_1 +x_2+x_3+x_4+ ....... + x_m}{m}$ = 78%

And , $\frac{(x_1+x_2+x_3+x_4+ ......+x_n ) + (x_1+x_2+x_+x_4+.....+x_m)}{m+n}$ = 80%

So , 0.82×n + 0.78×m = 0.80× (m+n)

Or, 0.82×n - 0.80×n = 0.80×m - 0.78×m

Or, 0.02×n = 0.02×m

Or, $\frac{m}{n}$ = $\frac{0.02}{0.02}$

∴ $\frac{m}{n}$ = 1

I.e m = n

Hence The relation between m and n is , m = n Answer

6 0

3 years ago

Diana invested $3000 in a savings account for 3 years. She earned $450 in interest over that time period. What interest rate did

Tanya [424]

Answer:

$r=0.05$

Step-by-step explanation:

we know that

The simple interest formula is equal to

$I=P(rt)$

where

A is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest

t is Number of Time Periods

in this problem we have

$t=3\ years\\ P=\$3,000\\I=\$450\\r=?$

substitute in the formula above

$450=3,000(3r)$

solve for r

$450=9,000(r)$

$r=450/9,000$

$r=0.05$

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4 years ago

What is the fraction for 7.71

igomit [66]

The answer is 771/100 or 7 and 71/100
You divide by 1 but to do that, you must move the decimal so that there are only whole numbers, but if you move the decimal, then you have to do the same for 1 but you move it to the right instead of the left=771./100.

4 0

3 years ago

Read 2 more answers